how to zero pad a matrix?

hi,

my input matrix "x" is a 3X1 matrix.

and i'm using it in the formula

r=x^t (t is some value)

but it is asking for a square matrix or a scalar value.

so, how to convert that 3X1 matrix to 3X3 square matrix by padding zeroes.

please suggest, thanks in advance

Answer 1

[dpb]

More than likely you're actually looking for the "dot" operator .^ to return the element-wise values of the vector x I'd venture...but, if you really are intent on turning into an array, simply

[x zeros(length(x),length(x)-1)]^t

is the generic expression (but I still don't think that's what you intend/want).

Answer 2

[Star Strider]

You likely need to use element-wise operations:

r=x.^t;

Note the ‘.^’ replacing ‘^’. See the documentation for Array vs. Matrix Operations for details.